Stomach "Noises"

Hey everyone. I am pretty new to the boards here. My stomach, for the past couple of years now, has been making noises unexpectedly. It does this when I am not even hungry. All of a sudden, if I am sitting in a quiet room, it rumbles. Sometimes I can feel it building up. It is not gas or anything like that. It is just a noise in my stomach. Sometimes it isn't loud and sometimes it is. Can anyone tell me what this is and how to get rid of it?